_PERMIT FILE - M1997053 ‎(36)‎

• Permit No: M1997053
• IBM Index Class Name: Permit File
• Section_Exhibit Name: EXHIBIT I SOILS INFORMATION
• Media Type: D
• Archive: No

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U.S. DEPARTMENT OF AGRICULTURE PAGE 2 OF 3
�URAL RESOURCES CONSERVATION SERVICE 01/28/97
CONSTRUCTION MATERIALS
note -- CONSTRUCTION MATERIALS
This report gives information about the soils as a source of roadfill, sand, gravel, and topsoil. The soils are rated
�od", "Fair", or "Poor" as a source of roadfill and topsoil. They are rated as a "Probable" or "Improbable"
rce of sand and gravel. The ratings are based on soil properties and site features that affect the removal of the
soil and its use as construction material. Normal compaction, minor processing, and other standard construction
Ictices are assumed. Each soil is evaluated to a depth of 5 or 6 feet.
Roadfill is soil material that is excavated in one place and used in road embankments in another place. In this report,
soils are rated as a source of roadfill for low embankments, generally Less than 6 feet high and less
cting in design than higher embankments. The ratings are for the soil material below the surface layer to a
th of 5 or 6 feet. It is assumed that soil layers will be mixed during excavating and spreading. Many soils have
layers of contrasting suitability within their profile. The report entitled Engineering Index Properties is also available
tit provides detailed information about each soil layer. This information can help determine the suitability of each
er for use as roadfill. The performance of soil after it is stabilized with time or cement is not considered in
the ratings.
Iratings are based on soil properties, site features, and observed performance of the soils. The thickness of
suitable material is a major consideration. The ease of excavation is affected by large stones, a high water table,
and slope. How well the soil performs in place after it has been compacted and drained is determined by its strength (as
Ierred from the engineering classification of the soil) and shrink-sweLL potential.
Soils rated "Good" contain significant amounts of sand or gravel or both. They have at Least 5 feet of suitable
erial, a low shrink-swell potential, few cobbles and stones, and slopes of 15 percent or less. Depth to the
er table is more than 3 feet
is rated "Fair" have more than 35 percent silt- and cLay-sized particles and have a plasticity of less than 10.
y have a moderate shrink-swell potential, slopes of 15 to 25 percent, or many stones. Depth to the water table is 1
3 feet.
Is rated "Poor" have a plasticity index of more than 10, a high shrink-swell potential, many stones, or slopes of
e than 25 percent. They are wet, and the depth to the water table is less than 1 foot. These soils may have
layers of suitable material, but the material is less than 3 feet thick.
Id and gravel are natural aggregates suitable for commercial use with a minimum of processing. Sand and
gravel are used in many kinds of construction. Specifications for each use vary widely. In this report only
probability of finding material in suitable quantity is evaluated. The suitability of the material for specific
poses is not evaluated, nor are factors that affect excavation of the material. The properties used to evaluate
soil as a source of sand or gravel are gradation of grain sizes (as indicated by the engineering classification
of the soil), the thickness of suitable material, and the content of rock fragments. Kinds of rock, acidity, and
atification are given in the soil series descriptions. Gradation of grain sizes is given in the Engineering Index
parties report.
oil rated as a "Probable" source has a layer of clean sand and gravel or a layer of sand or gravel that contains
to 12 percent silty fines. This material must be at least 3 feet thick and less than 50 percent, by weight, large
stones. ALI other soils are rated as an "Improbable" source. Coarse fragments of soft bedrock, such as shale and
sittstone, are not considered to be sand and gravel.
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